Nadessuha's Things

Hi, so I was reading on or off and chapter 45 season 1 finale the artist dedicated sections of art sent in my other WEBTOON artist congratulating them on completing the first season. I’m looking for NANABA I want to know which WEBTOON they’ve made because I feel like their art style is really familiar.

Basically I read this shoujo manga years ago and I keep thinking about it but I don’t remember the name. It was about this girl she had black hair and the guy had blonde hair (almost every other shoujo manga LOL) and one distinct thing I remember about the guy was that he LOVED astronomy and stars. Like he was obsessed but wouldn’t tell people because he was the cool guy or whatever. I remember after the two pleads start dating she gets him a gift where it’s like those devices where the whole room turns into stars and the Milky Way or something. The girl is your typical shoujo girl shy, innocent and whatever. I do remember this one part where I think they’re on a school trip? And I think he knows that the female lead has a crush on him??? Idk but he tried getting together with her sister at that trip to like make her get over him or something. At the end of the manga they get married and I think she becomes a hair dresser or he becomes one I deadass cannot remember but I think it was something like that or I could be completely wrong. CAN SOMEBODY PLEASE HELP ME FIND THIS MANGA. I posted this on Reddit with no luck but I know I read the manga head I just for the life of me cannot remember the name of it or any names of the characters. Someone please help